Cultivator



April 4, 1944. c, s NOBLE 2,345,702

CULTIVATOR Filed Oct. 10, 1940 2 Sheets-Sheet 1 n", fl: 9 m (Anya.

April 4, 1944. c. s. NOBLE CULTIVATOR Filed Oct. 10, 1940 2 Sheets-Sheet2 dog/ k012i C. 15. Noble.

Patented Apr. 4, 1944 UNITED STATES PATENT OFFICE CULTIVATOR CharlesSherwood Noble, Nobleford, Alberta, Canada Application October 10, 1940,Serial No. 360,687

3 Claims.

My invention relates to improvements in cultivators of the type whereinan elongated blade is drawn through the ground slightly below thesurface thereof for the purpose of severing weed roots from the plantsthereof, in contrast to the type of cultivator which turns the soil overand buries the weed, an object of this invention being to provide adevice of the character herewithin described embodying a novel hanger,blade and carrier construction together with means for adjusting thespacing of the hangers and for adjusting the inclination thereof whenthe cultivating blade becomes worn.

With the above more important object in view and such other minorobjects as may appear as the specification proceeds, my inventionconsists essentially in the arrangement and construction of parts all ashereinafter more particularly described, reference being had to theaccompanying drawings, in which:

Figure 1 is a side elevation of my cultivator.

Figure 2 i a plan view of my cultivator.

Figure 3 is a perspective detail illustrating the means whereby thespacing of my hangers may be adjusted.

Figure 4 is a perspective detail illustrating the means by which thevertical inclination of my hangers may be adjusted and set.

Figure 5 is a perspective detail illustrating the means by which myspaced spring teeth may be adjusted as to proximityand brought intoalignment with the hangers when same is altered.

Figure 6 is a section of Figure 3.

the spacing of the on the plane S66-6 Figure '7 is a cross-sectionillustrating my cultivating blade and carrier therefor.

In the drawings like characters of reference indicate correspondingparts in the different figures.

By reference to the accompanying Figures 1 and 2, it will be seen thatmy cultivator comprises a superstructure I mounted upon a pair of groundwheels 2, this superstructure comprising a framework formed of theconverging channels 3, which extend forwardly of the rectangularlyarranged channels 4 and 5, and the opposing side pair 6. The frameworkis further strengthened by the bracing diagonals 1. Double angulatedaxles ii are provided and upon the outwardly projecting portions 9thereof the Wheels 2 are journalled, the horizontal, inwardly projectingextensions of these axles passing through apertures in the members 6 andterminating in bearings i6 secured to the under side of the diagonals 7.

A pair of levers H is also provided for raising or lowering thesuperstructure I from either side thereof, these levers being fulcrumedat the point l2 and being provided upon the ends of the cranked portionsi3 thereof with a roller i 4 designed to ride against the verticallyrotatable portion IS.

A notched quadrant I 6 is provided together with conventional pawls (notshown), which latter of course, are located upon the inner side of thelevers H for engagement with the notches and finally in this connectiona pair of upwardly projecting arms I! are keyed to the portions 8 of theaxles, balancing springs it being anchored at their ends to the arms andto the superstructure at the points l9 respectively to ease thesettlement of the superstructure when being lowered.

The essential novelty of my cultivator resides in what followshereinafter.

The blade and carrier best illustrated in the accompanying Figure 7, andcollectively enumerated IS in the accompanying Figures 1 and 2 (and ofwhich I provide two or more, spaced as illustrated in Figure 2), aresecured to the lower ends of a pair of hangers 26, these hangers beingformed of downwardly depending plates mounted edgewise upon thecultivator with respect to the direction of travel thereof, which is inthe direc tion of the arrows 2!. It will accordingly be seen that whilea relatively deep section is presented by the hangers in the directionof travel thereof, these members are of inconsiderable thickness in aplane transverse to their direction of travel.

By reference particularly to the accompanying Figure 3, it will be seenthat my hangers are mounted upon the horizontal bars 22, the front endsof which are provided with apertures 23, through which the portions 8 ofthe aXles may extend and yet still be free to rotate. The rear ends ofthe members 22 terminate in the plates 24, which are bolted to similarplates 25, these plates together with the associated bolts constitutingslidable clamping assemblies 26, which may be tightened on the channel 5or slacked off when it is desirable to move the hangers transversely.

It will be seen by reference to the accompanying Figure '3 that thehangers themselves are pivotally mounted upon the bars 22 at the point27, a segmental slot 28 being provided in the upper rear corners of thehangers to receive the studs 29, which also extend through the bars 22.

By reference particularly to the accompanying Figure 4, it will be seenthat a portion of the bars 22 are inwardly angulated as at 30 to act 2as bearings for the ends of the vertically positioned adjusting bolts3!, which extend through inwardly and horizontally projecting brackets32, having screw-threaded apertures formed therein for the reception ofthe bolts 3|. By this arrangement, it will clearly be seen that I haveprovided means for adjusting the vertical inclination of the hangers ina positive manner such that they cannot be rotated counterclockwise withrespect to the accompanying Figure 1 for example, while the cultivatoris being pulled forwardly.

In the accompanying Figure 6 I have 1111159,

trated the manner in which the leading edge 33 of the hangers isexpanded and rounded, by'this arrangement being less liable toaccumulate entanglements of trash. From the figure in question it willbe seen that the expansion of the leading edges is obtained by the useof lengths of longitudinally cut pipe 34, which are filled in upon theconcave sides thereof by flowing welded metal 35 thereinto so as tobuild up the section to the desired contour.

In the accompanying Figure I have illustrated particularly one of mypair of spring teeth 36, these being mounted upon a transverse andlongitudinally slotted bar 31 secured to a pair of downwardly extendingbrackets 38, bolted adjacent the junction of the members 3 and 6.

It will be seen that a pair of guides 39 spaced apart to an extent equalto the width of the bar 31, secure the spring teeth to the bar with theassistance of wing nuts 40 and associated bolts (not shown) whichproject between the guides 39 and through the slot 4|. It will now beclearly apparent that no difficulty will be experienced in achievingdirectional alignment of the spring teeth36 with the hangers 20.

Finally in this context it will be noted that the brackets 33 are skewedand project outwardly somewhat when viewed in plan beyond the limits ofthe framework. This is to permit separation of the spring teeth apartfrom each other and alignment thereof with the hangers .23 when thelatter are also separated a maximum distance apart.

In the accompanying Figure '7 I have illustrated my blade carrier 65 thesame consisting of an elongated, transverse, curvilinear stiffening bar,the cultivating blade 66 being secured against the upper surface 61 ofthis carrier and positioned between the upper surface thereof and thebrackets 43.

Bolts 68 extend through the brackets, the blade and the carrier, whichmay of course be of any desired thickness or width, and it will beappreciated that the arrangement of the accom panying Figure '7constitutes a peculiarly simplified form of blade carrier.

The blade is reversible upon detachment with the carrier or bar from thehangers 20, and upon being reversed, the bolts 68 of course, wouldextend through the apertures 69.

Since many modifications can be made in the invention herein describedand since the accompanying drawings have been prepared only to i1-lustrate the relative arrangement and interaction of parts and not withregard to accuracy of dimensions for manufacturing purposes which inview of this disclosure I consider to entail merely mechanical skilltogether with the skill of the mechanical draftsman, and since manyapparently widely different embodiments of this invention may be madewithin the scope of the accompanying claims without departing from thespirit and scope of the same it is intended that all matter contained inthe accompanying specification shall be interpreted as illustrative onlyand not in a limiting sense and I desire only such limitations placedthereon as justice dictates.

What I claim as my invention is:

1. In a cultivator, an elongated, bodily detachable blade and stiffenercombination, said blade when viewed in transverse cross-section, beingconvex upon the top side, said top side being in contact with the lowerends of spaced hangers depending from said cultivator superstructure,said stiffener being secured against the under side of said blade, saidblade and stiffener being held in place by bolts extending through bothand through the said lower ends of said hangers.

2. In a cultivator, an elongated, bodily detachable blade and stiffenercombination, said blade having a leading cutting edge and a paralleltrailing edge, and being convex upon the top side thereof when viewed intransverse cross-section, said top side being in contact with the lowerends of spaced hangers depending from said cultivator superstructure,said leading edge being in a lower horizontal plane than said trailingedge thereof,

said stiffener being secured against the under side of said blade, saidblade and stifiener being held in place by bolts extending through bothand through the said lower ends of said hangers.

3. In a cultivator, an elongated, bodily detachable blade and stiffenercombination, said blade having top and under sides, at least one of saidsides being arched, said top side being in contact with the lower endsof spaced hangers depending from said cultivator superstructure, saidstifiener being secured against the underside of said blade, said bladeand stiffener being held in place by bolts extending through both andthrough the said lower ends of said hangers.

CHARLES SHERWOOD NOBLE.

